Insulated wall for open hearths



Sept. 1.9, 1939. E, PARSONS v 2,173,764

Vmsnm-WED WALL FOR OPEN HEAR'IHS Filed Nov. 7, 1938 Patented sept. 19, 1939 s UNITED STATES msm'rEn WALL Fon orEN unan'ms Edward J. Parsons, Vandergrift, Pa. Application November 7, 1938, Serial No. 239.365

iClaim.

This invention relates to insulating the walls of a furnace.

An object of the present invention is to provide l the upright walls of a furnace with insulation I which can be easily removed and replaced without any loss of material. v Other objects and advantages will become apparent as the description proceeds and reference is had to the accompanying drawing, in which:

l. Figure 1 is a sectional plan of a furnace showing the insulation in position;

Figure 2 is a side elevation, showing the man ner of supporting the insulation on the walls of the furnace; Y

u Figure 3 isa detailed section of one of the removable insulating panels in position upon a wall of the furnace; and,

Figure 4 is a detailed perspective of the pan or receptacle containingl the insulation and showing a means for holding the insulation in said pan or receptacle.

Inthe drawing, the numeral 2 represents a furnace of conventional design having a back wall 3 and end walls 4 of conventional type heat resisting bricks. 'I'he furnace may be an open hearth or other structure in which relatively high temperatures are attained.

The present invention includes insulated shields for the exterior walls of the furnace which comprise one or more shallow pans or receptacles 5, of any desired depthand width, within which is secured, inany conventional manner,

steel strips or insulating reenforcing members i running lengthwise and cromvise thereof, said reenforcing members 6 overlapping and being maintained in spaced relation to the bottom of said receptacle 5. The longitudinal members 6 have their ends bent at right angles to the main plane of the members, as indicated at l in Figa ure 3, and each is provided with a ange l extending in the same direction as the members 6 so as to provide a support for said members to maintain them in spaced relation from the bot-4 tom of the receptacles or pans 5. u The pans or receptacles are lled with plastic heat insulation material 9 which is retained therein by the reenforcing members 8. Suitable eyelets or other conventional type fastening members I l are secured to each pan or receptacle o l for receiving a supporting hanger I2 which is secured, in any conventional manner, to a beam or frame member il mounted upon an upright supporting member l5. 'Ihe receptacles I' are detachablyconnected with the supporting frame I4 in order that. they may be removed when it becomes necessary to 'repair the` wall of the furnace.

Mounted upon the bottom or back of the receptacle 5 is a rib or plate I6 cooperating with cross wires Il for holding the heat insulating shield 5 against the outer surface of the wall of the furnace. 'I'hese cross wires I'I are detachably secured, in any conventional manner, to the upright supporting members I5.

-Under the present invention.'it is possible to in- 10 sulate the outer surfaces of the walls of an open hearth or the like furnace by positioning and arranging any desired number of heat insulating shields and, detachably supporting the shields in relation to the wall of the furnace so that the i6 shields will be independent of eachother and can be easily removed when it becomes necessary to make repairs to the furnace walls. Any number of shields may be used, the number dependn ing upon the size of the furnace desired .to be inzo sulated.

Furnaces of such a character are usually inl sulated against heat loss. 'I'his insulation 'is usually applied to nails positioned between the joints of the bricks, allowing them to protrude a suflicient distance to permit plastic material to be applied by the spot coating methodand allowed to dry, after which a final coat is applied with a trowel to produce a smooth iinish. As

the end walls of the furnace become thin, the

insulation blisters and falls on, which necessitates repair of the walls. This requires the removal of the remaining insulating material and its reapplicatlon upon completion of the repairs to the furnace walls, a costly procedure due to being unable to use the furnace for several days while the new coating of insulation is being applied.

Under the present invention, by providing the furnace walls with removable insulatioman eilicient, economical insulation is provided for the walls of a furnace. When repairs are necessary to the furnace walls, the insulation pans or receptacles will be independent of each other and can easily be removed for the repairs and restored 46 in much less time than under the old practice.

While Ilhave shown and described a specic embodiment of the invention, it will be understood that I do not wish to be limited exactly thereto, since various modifications may be made '50 without departing from the scope of the invention'I as defined in the following claim.

In combination with a furnace within which relatively high temperatures are maintained,

their ends bent at right angles to the main plane of said members to maintain said reenforcing members in spaced relationship to the closed bottom of said receptacle and heat insulating material positioned within said shallow receptacle and.

surrounding said reenforcing members so as to be maintained in position within said shallow receptacles.

EDWARD J. PARSONS. 

